There is a family living in Kitchen St, near Kings Dock, in Liverpool 1851 which may fit:-

John Cowley 35 Shipwright I.O.M.
Euphemia Cowley 32 Scotland
Joseph 8
Charles 5
Elizabeth 18mths
Catherine Gilbert 45 Visitor Scotland

IGI has a marriage of John Cowley to Euphemia Ploney ? 12 Aug. 1835. There are other children listed with the mothers christian name as Phoebe, Phebe as well as Euphemia.

Free BMD has a death for a Phoebe Cowley in Liverpool 1856.

Len Faragher